 Government documents, particularly those concerning trade and diplomacy, were first compiled in 1403.This compilation, the "Treasury of Royal Succession," is called "Rekidai Hōan" in the Japanese pronunciation, and continued to be compiled fairly regularly until 1619.However, this increased organization was not accompanied by political stability; the kings of Nanzan and Hokuzan, along with the emperor of China, all died within the span of just a few years (1395–98).